|
Title |
Development Length in Compression of Beam Bars Terminated within Exterior Beam-Column Joint
|
|
Authors |
성민규(Min-Kyu Seong) ; 천성철(Sung-Chul Chun) |
|
DOI |
https://doi.org/10.4334/JKCI.2020.32.4.341 |
|
Keywords |
압축철근; 정착길이; 설계식 compression bar; development length; design equation |
|
Abstract |
The current design provision of development length of compression bars are based on very limited experimental results and cannot precisely predict compression anchorage strength. For hooked bars, the compression development length may be longer than the tension development length, although the compressive anchorage has more advantageous conditions than tensile anchorage of hooked bars has. As a result, an unnecessarily long development length is required and the column sectional dimension may be enlarged. In this study, equations to predict compression anchorage strength have been proposed based on test data on compression anchorage. In addition, design equations for compression development length of straight bars and hooked bars incorporating a 5 % fractile safety factor have been derived. The proposed equations have been compared with current design provisions and shows that required embedment lengths from the proposed equations are shorter than lengths calculated by current design provisions under same conditions.
|